Like many potential Bronco owners, I plan to purchase the 2.7L engine. I expect the engine compartment to be tight based on the pictures I have seen. Ideally, I would be seeking an aftermarket ARB air compressor. Although many owners of other vehicles end up installing them in the engine compartment, I may be going the route of an under seat install and saving any engine compartment space for a potential axillary battery. A buddy installed his ARB using the TeraFlex mount kit on his Jeep. Over time I expect TeraFlex to develop a Bronco kit and video taking into consideration any special adaptions to accommodate the under-seat heat vent. See reference links below.
teraflex.com

TeraFlex - JK 4dr: ARB Air Compressor Under Seat Mount Kit
The TeraFlex JK 4dr: ARB Air Compressor Under Seat Mount places your ARB On-Board High Performance 12-Volt Twin Air Compressor conveniently under the front passenger seat (driver seat of 2007 model year) of your 4-door JK Wrangler Unlimited protecting it from the elements. This kit also...